Lane purchase secure access module (PSAM) for city road bridge free stream toll collection and use method thereof

Abstract

The invention provides a lane purchase secure access module (PSAM) card for city road bridge free stream toll collection and a use method of the lane PSAM card for the city road bridge free stream toll collection. An arborescence hierarchical structure is adopted by a file structure of the PSAM card, a root node of the PSAM card is a master control file, a child node of the PSAM card comprises a directory data file, a card public information file, a terminal information file, a master key file, a basic application directory, a first extensive application directory and a second extensive application directory, wherein the second extensive application directory comprises an application public information file, a terminal application trade serial number and a second key file. The use method of the lane PSAM card for the city road bridge free stream toll collection comprises a bidirectional safety certification process in concurrent operation of a road side unit to an on board unit, wherein the bidirectional safety certification process comprises an information identification process of the road side unit to the on board unit, and an access permission certification process of the on board unit to the road side unit in sequence.

Description

technical field [0001] The invention relates to a technical scheme of a lane PSAM (Purchase Secure Access Module, point-of-sale terminal security access module) card based on urban road and bridge free-flow electronic toll collection in the field of urban intelligent transportation applications. Background technique [0002] At present, the urban road and bridge free-flow tolling technology is one of the most advanced road and bridge tolling technologies in the world. It is a fast electronic toll collection system without any toll roadblocks. This kind of charging system is quite mature in some developed countries, but due to the great differences between China's application market and foreign application markets, there will be certain risks in directly using the existing international mature technology; In the research stage, there are no application cases yet. [0003] Electronic Toll Collection (ETC for short) is an automatic toll collection system for roads, bridges an...

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Problems solved by technology

[0005] At present, the PSAM card technical specifications in the DSRC (Dedicated Short Range Communications) national standard GB / T 20851-2007 "Dedicated Short Range Communications for Electronic Toll Collection" of China's electronic toll collection system are mainly used in the electronic toll collection of highways in some provinces and cities. Its processing speed is slow, the execution time of each COS instruction is long, and it cannot cope with the concurrent processing of multiple OBUs, so it cannot meet the application requirements of urban road and bridge free flow electronic toll collection

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